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 A271579 Magic sums of 4 X 4 magic squares composed of triangular numbers. 5

%I #7 Apr 14 2016 10:05:23

%S 1402,1912,2162,2164,2422,2612,3362,3512,3737,3952,4207,4257,4322,

%T 4462,4887,4972,5312,5362,5442,5466,5482,5593,5986,5992,6162,6337,

%U 6438,6532,6662,6747,6792,6887,6974,6987,7112,7177,7437,7507,7662,7975,8032,8222

%N Magic sums of 4 X 4 magic squares composed of triangular numbers.

%H <a href="/index/Mag#magic">Index entries for sequences related to magic squares</a>

%e Examples of 4 X 4 magic squares composed of triangular numbers.

%e .

%e |----|----|----|----|

%e | 66 | 1 | 300|1035|

%e |----|----|----|----|

%e | 465| 630| 171| 136|

%e |----|----|----|----|

%e | 780| 105| 496| 21 |

%e |----|----|----|----|

%e | 91 | 666| 435| 210|

%e |----|----|----|----|

%e The magic constant is 1402 = a(1).

%e .

%e |----|----|----|----|

%e | 1 | 45 | 435|1431|

%e |----|----|----|----|

%e | 300|1326| 276| 10 |

%e |----|----|----|----|

%e |1596| 190| 120| 6 |

%e |----|----|----|----|

%e | 15 | 351|1081| 465|

%e |----|----|----|----|

%e The magic constant is 1912 = a(2).

%Y Cf. A000217, A271580, A271711. Subsequence of A271581.

%K nonn

%O 1,1

%A _Arkadiusz Wesolowski_, Apr 10 2016

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